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arXiv 2003.05291math.CO
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受限颜色$n$ -颜色组合物

Restricted Color $n$-color Compositions

Brian Hopkins, Hua Wang

摘要:

Agarwal在2000年推出了$n$ -彩色合成,随后的大多数研究都集中在限制哪些部分是允许的。在这里,我们专注于限制允许的颜色。经过三个一般性的结果,给出递归公式的情况下,允许的颜色,禁止的颜色,和颜色满足模块化条件,我们考虑几个更具体的条件,建立直接的公式和连接到其他组合对象。证明是组合的,主要是使用第一个命名的作者在2012年引入的斑点镶嵌的概念。

英文摘要:

Agarwal introduced $n$-color compositions in 2000 and most subsequent research has focused on restricting which parts are allowed. Here we focus instead on restricting allowed colors. After three general results, giving recurrence formulas for the cases of given allowed colors, given prohibited colors, and colors satisfying modular conditions, we consider several more specific conditions, establishing direct formulas and connections to other combinatorial objects. Proofs are combinatorial, mostly using the notion of spotted tilings introduced by the first named author in 2012.

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